Circuit-breaker.



PATENTED DECyl', 190'?. E', W. BLAI f CIRCUIT BRBKFJJ.l APPLIGATION HLEfD uns 19; 1906.

www? /A VEN 70H "/WWM` @wwf-4% THALMLSQWMM of thc insulating tube 27, iitting overjanV elongation oi the nut i3, and in a recess in the lochmit l5.

it is evident that this form of quick break attachment, applied to a rod connection,

may be employed, for rupturing circuitsl through air, oil, or other insulating media.

F rom the above construction it is obvious that, with the plug in osition, electrical connection is established etween the bars l and 2, through the tube 9, plug contact 22, plug :Z0-21 and contacts 17 and 1S. Upon witlulrawing the plug, the friction of the contact 17 .upon the tube 23 causes the tube to remain stationary in said contact until the spring 24 has been compressed, whereupon the tube snaps back to its original position upon the plug, in this way-causing a practically instantaneous, and long, break in tlux circuit, 'and extinguishing any arc formed at the contacts.

What .l claim as new, and wish to secure by Letters Patent, is'- l. An electric-circuit breaker comprising a plug, as a primary connection,y a tubemounted upon and -yieldingly connectedwith the plug by means of an open h elical spring, as a secondary connection, and primary and secondary socket-contacts to engage the plug and tube respectivelyt An electric-circuit breaker com'pris'ino a plug, as a primary connection, a cylindrical tube mounted upon the plug, as a secondary connection, priinary and secondary socketts to engage the plug and tube respeen upon e plug, and within the tube, seated at one id against a shoulder on the plug r. the end thereof next the contacts and the other end against a shoulder in the tube near the end thereof next the handle.

and an open helical spring mounted.,

eff/1,293

3. An electric-circuit breaker comprising a plug, as a primary connection, a cylindrical tube mounted upon the lug, as-a secondary connection, primary and) secondary socketcontacts to engage the lug and tube re'- spectivcly, and an open he ical spring mount ed upon the plug, and Within the tube, seated at one end against a shoulder on# the plu near the end thereof next the contacts an at the other end against a shoulder in the tube near the end thereof'next'the handle, and'acting upon the tube to retract it from its socket-contact as the plug is Withdrawn and the spring suiciently compressed.

4. A plug-switch comprisin primary ,and

secondary socket-contacts an primary and'.

secondary connections consisting of a plu and tube respectively, the lattermounte upon the former. and yicldingly `connected therewith by means of an o en helical spring vmounted upon the plug an within the tube, the spring being seated at one end against a shoulder on the plug nearthe end thereof next the contacts and at the other end'against a shoulder in' the tube near theend thereof next the handle, and operating when the.

plug is withdrawnrom its Contact until contiguous turns ofthe sprlng are 1n contact,

or .nearly so, to retract the tube from itsV socket-contact.

5. A plug-switch comprising a movable plug,Y an vinsulating hande rigidly attaclied thereto, a spring contact, carried by the plug, to engage one terminal of the switch, and a cylindrical tube mounted upon and yieldingly connected with the plug b means of an open helical spring and adapte to rictionally engage a stationary secondary contact at the other terminal of the switch, the plug making' Tlfitnesses:

Josnrir Poor., IEITZHUGH Dmnnm.. 

